I have just changed my ports for HTTP and HTTPS access on my server to the standard 80 / 443 as I don't run anything else on my home IP. However, when looking on the server dashboard, the In-Home (LAN) access has changed but the Remote (WAN) access has remained at the default 8096 (as I haven't set up a certificate yet).
This ONLY effects the dashboard link as if you enter the emby server manually with the new port numbers it connects OK.